Hunting for QCD strings in e+e−-annihilation

Marina Kozhevnikova; Armen Oganesian; Oleg Teryaev

doi:10.1051/epjconf/201920402005

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Proceedings

Open Access

EPJ Web of Conferences 204, 02005 (2019)
https://doi.org/10.1051/epjconf/201920402005

Hunting for QCD strings in e⁺e⁻-annihilation

Marina Kozhevnikova¹^*, Armen Oganesian²^** and Oleg Teryaev¹^***

¹ Joint Institute for Nuclear Research, Dubna, Russia
² Institute of Theoretical and Experimental Physics, Moscow, Russia

^* e-mail: kozhevnikova@jinr.ru
^** e-mail: armen@itep.ru
^*** e-mail: teryaev@theor.jinr.ru

Published online: 3 April 2019

Abstract

We develop a new mathematical method of extraction of nonperturbative corrections in QCD. The main attention is directed to the study of dimension 2 operator and its properties. The ordinary perturbation theory (PT) and analytical perturbation theory (APT) are used. The D-function is explored in dependence on both Q² and Borel parameter M². It is shown that the C₂ coeffcient of the dimension 2 operator is negative and its compatibility to zero depends on choice of PT or APT and can vary in chosen ranges of M². The strong (anti)correlation between C₂ and gluon condensate found previously is confirmed.

© The Authors, published by EDP Sciences, 2019

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.